Metal: 925 Sterling Silver; Size: 12mmx12mm/inner 8.5mm, width 5.3mm; Earrings are Made very Well, Excellent Quality; [Shipping]: We offer free shipping by USPS First-Class Mail (2 to 6 business days). You may choose expedited shipping services, please note an expedited shipping cost would be charged. All packages will be shipped out on the same day or next business day of your purchased day. Please make sure to include the correct address during checkout. Please kindly note that the delivery day depends on your local post office.